Английский Этимологический словарь - random

- 1655, from at random (1565), from M.E. randon "impetuosity, speed," from O.Fr. randon "rush, disorder," from randir "to run fast," from Frankish *rant "a running," from P.Gmc. *randa. In 1980s college student slang, it began to acquire a sense of "inferior, undesirable."